Roll-bar for paper-pulp engines.



C. I. WARE. ROLL BAR FOR PAPER PULP ENGINES.

APPLICATION FILED MAR 6, I915.

atented Feb. 1, 1916.

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THE COLUMBIA PLANOGRAPH co.. WASHINGTON, D. c.

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CHARLES IRVING WARE, OF HOLYOKE, MASSACHUSETTS, ASSIG-NOR OF ONE-HALF T FRED E. MAXFIELD, OFI-IOLYOKE, MASSACHUSETTS.

ROLL-BAR F013, PAPER-PUFF ENGTINEE.

Specification of Letters Patent.

Patented Feb. 1,1916.

Application filed March 6, 1915. Serial No. 12,510.

1 b all whom it may concern:

Be 1t known that 1, C nemas IRVING WARE, a citizen of the United States of" Pulp Engines, of which the following is a specification.

This invention relates to improvements 1n roll bars for paper pulp engines which are used to beat the paper pulp.

My present invention is an improvementv of the roll bar shown, described, and claimed. in Letters Patent of the United States, granted to me on May 17, 1910, numbered 958,708, upon an application filed November 24, 1909, Serial No. 529,676. The construction of roll bar in my aforesaid patent 1S1 built up of three pieces, two of which are wrought iron with a steel blade located be: tween the same. Experience has shown that this bar, unless very carefully constructed, will not be as rigid and firm as if the memher which receives the steel blade is formed from a single piece of metal.

As in my patent, above referred to, an object of the present invention is to expose as little as possible the inlaid steel blade to the corroding or chemical action of the acids contained in the paper pulp which is being beaten, since it is a well-known fact that steel does not resist chemical action of the acids contained in the paper pulp as well as iron.

My present invention, broadly stated, comprises a roll bar that 1S constructed from a single one-piece member of wrought 1ron or other suitable material having a longitudinal groove out therein by any suitable means and locating in this groove the steel plate, the whole then being heated and welded together.

The invention willbe fully descrlbed in the specification and specifically pointed out in the appended claims.

In the accompanying drawings forming a part of the specification Figure 1 is a perspective view showing the one-plece wrought iron bar having a longitudlnal grooved cut therein, the upper or abrasive edge of the bar being formed with two parallel oppositely disposed portions; Flg. 2 18 a perspective view, similar to Fig. 1, but showgroove.

ing the steel bar located in the groove of the wrought iron bar; and Fig. 3 is a detail view of the steel blade before insertion in the grooved bar.

Referring to the drawings in detail: 1 designates the wrought iron bar member in which is first out the longitudinally arranged groove 2. This groove, as will be observed, is formed with an inclined portion 3 which terminates in a sharp angular part l. The width of the other portions of the groove is the same throughout its length as will be observed from Fig. 1. After the groove has been carefully out, the steel blade or plate 5, shown in Fig. 3, is then inserted in the The shape of this blade, in crosssection, corresponds exactly with shape of the groove. After the insertion of the steel blade 3 in the groove of the bar, the whole is then brought up to a welding temperature, when the bar is forged into the shape shown in Fig. 2 producing in effecta onepiece integral mass. The forging operations necessarily reduce the thickness of the bar at the beating edge 6 and also result in male ing the blade tapering. The side portions 7 and 8 are substantially the same in thickness as the blade after the forging operations are completed. The purpose of the inclinedportion 3 and angular part 4'. of the groove is to effect a perfect weld or union between the bar and the inserted blade. It will also be'observed that on account of the thickness of the side portions 7 and 8 being the same as the inserted blade that, when the bar as a whole wears down from use, the same relative thickness between the blade and the portions 7 and 8 will still remain. It should be stated that, as the bar wears away the thickness of the blade also increases and, on account of this increase in thickness, the wear will be very much slower.

The particular and definite advantages of making a roll bar by this process instead of by the process shown in my aforesaid patent is that the process therein described is very much stronger and rigid, being in fact a one-piece member. This method of manufacture substantially covers up all of the surface of the inserted plate 5 and prevents the same from coming into contact with the acids contained in the pulp.

The present invention obviates the possibility of the steel blade from chipping off at its edges when the bar is in use, the small particles of steel produclng an lnferior qual ity of paper, as is well known. Further, on

kind of materials, as any other materials that will accomplish the same results in equally as good manner may, of course, be substituted or used.

It is also within the province of my invention to vary the dimensions of the steel blade and the groove 2 therein, as readily understood. It is also evident that on account of the tapered shape of the steel plate after weldingthat the possibility of the plate becoming dislodged is thoroughly prevented, since the tapered part extends toward the beating edge 6 of the bar.

It has been found in practice that the soft iron members 7 and 8 serve to draw out the fibers of the pulp much better than where the hardened plate alone is used.

The tapered product necessarily prolongs the life and usefulness of the bar since, as stated, the tapered form of the inserted plate furnishes a thicker steel for beating up the pulp, as it wears down.

lVhat I claim is-- 1. A roll barfor paper pulp engines, comprising, a one-piece member formed with a groove therein, and a plate located in the groove and integrally secured to said memher.

2. A roll bar for paper pulp engines, comprising, a wrought iron one-piece member edge of the side-portions and substantially of the same thickness as one of said side portions. I

i 3. A roll bar for paper pulp eng1nes, consisting of two members, one having a longi tudinal groove therein and the other a steel plate of corresponding shape contained in the groove, the lower and upper ends ofithe groove and the inserted plate bemg of unequal thickness and one of the side portions of the grooved member which engages one of the sides of, the inserted plate being of the same thickness as the inserted plate, as

described.

i. A roll bar, for paper pulp engines,

comprising, a grooved one-piece member, H

the groove having its inner end formed with an inclined surface, a steelplate inserted in the groove and integrally secured to the wrought iron member, one of the portions of the wrought iron member adjacent to the inserted plate being of equal thickness, as said plateas described. T

5. A roll bar for paper pulp engines, 00111 prising, a one-piece member and a tapered plate located therein.

CHARLES IRVING lVARE. lVitnesses: f

H. E. HARTWELL,

HARRY Bowen.

Copies of this patent may be obtained for five cents eachyby addressing the Commissioner of Patents. Washington, I). G." i 

